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"In my mind I have gone all over the universe, which may make it less important for me to make piddling little trips... I did enjoy seeing Stonehenge. It looked exactly the way I thought it would look."
- Isaac Asimov
 |
| Garbage Screen | ||
| Use of bits of metal to confuse radar targeting of space stations. |
| "We'd better report this down to Earth," Joe said. "By the way, better not
describe our screen of tin cans on radio waves. Not even microwaves. It might leak. And we want to see if it works."
Just forty-two hours later they found out that it did work. A single rocket came climbing furiously out from Earth. It came from the night-side, and they could not see where it was launched, though they could make excellent guesses. They got a single guided missile ready to crash it if necessary. It wasn't necessary. The bomb from Earth detonated 300 miles below the artificial satellite. Its proximity fuse, sending out small radar-type waves, had them reflected back by an empty sardine can thrown away from the Platform by Mike Scandia forty-some hours ago. The sardine can had been traveling in its own private orbit ever since. The effect of Mike's muscles had not been to send it back to Earth, but to change the center of the circular orbit in which it floated. Sometimes it floated above the Platform—that was on one side of Earth—and sometimes below it. It was about 300 miles under the Platform when it reflected urgent, squealing radar frequency waves to a complex proximity fuse in the climbing rocket. The rocket couldn't tell the difference between a sardine can and a Space Platform. |
| From Space Tug,
by Murray Leinster. Published by Not known in 1953 Additional resources -
|
Later in the story, this method was formalized:
The three drone-handlers pushed their buttons. Nothing happened that
anybody could see. Actually, though, a small gadget outside the hull began to cough rhythmically. Similar devices on the drones coughed, too. They were small, multiple-barreled guns. Rifle shells fired two-pound missiles at random targets in emptiness. They wouldn't damage anything they hit. They'd go varying distances, explode and shoot small lead shot ahead to check their missile-velocity, and then emit dense masses of aluminum foil. There was no air resistance. The shredded foil would continue to move through emptiness at the same rate as the convoy-fleet. The seven ships had fired a total of eighty-four such objects away into the blackness of Earth's shadow. There were, then, seven ships and eighty-four masses of aluminum foil moving through emptiness. They could not be seen by telescopes.
I was unable to find references to radar-defeating chaff used by space craft (maybe both/all sides are afraid to be the first...).
"Shoot the ghosts," said Joe.
The idea of using chaff (bits of metal such as aluminum) to create false radar echoes was suggested as early as 1937. A formal scheme to dump packets of aluminum strips from aircraft to generate false echoes was put forward by 1942. The idea was fully developed by both sides (Allied and German), but oddly neither side used it until almost 1944. The reasoning went as follows: If the other side didn't have it, if they used it once they would give the idea to the other side, who would quickly duplicate it, and neither side had a way of adequately dealing with it.
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| Spaceships Should Last So Long |
| Space Station Shutters |
| MIT Proposes Space Bubbles To Combat Climate Change, Misses The Point Of Space Bubbles |
| Study Reveals Effect Of Space Travel On The Brain |
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'... the two pairs of waldoes in the screen followed in exact, simultaneous parallelism.'
'THE SPACE VESSEL was traveling swiftly… For over five thousand years they had Voyaged on and on.’
'They circled the vast audiences, dancing, twittering, chirping...'
'The sun-quilt was a patchwork of colors and materials on the inward side, but silvered on the outward side...'
'Jim, I saw them reduce four of my doctors and nurses into those little cubes!'
'Fats Jordan was hanging in the center of the Big Glass Balloon, hugging his guitar to his massive black belly above his purple shorts..'
'When confronted by hills, or rough terrain, it did not stop, but simply slowed until the task demanded equaled its steady power output.'
'... the brain is no longer subjected to the accustomed pull, and it expands slightly in all directions.'
